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Britain - Ordnance Q.F. 3inch 20cwt AA

Showing the details of the shells used(where known)
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Weapon Details
Flag
Ordnance Q.F. 3inch 20cwt AA
(Field Gun)
Blank
Manufactured1914 - 1944
Calibre76.20mm
LengthL/45
 
AP(AP)
76.20mm 7.26Kg 610M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.17 0.34 0.69 1.47 2.34 3.32 4.45 5.74
Penetration(mm@30°) 105 97 89 78 69 59 51 43
Penetration(mm@0°) 122 113 103 91 80 69 59 50
Hit Probability(%) 98 98 98 88 54 25 15 3

Vehicles in our database using this gun
Vehicle NameCommon Name
 Carrier Churchill 3 inch Gun Mk I (A22D) 
 

Hit probability is based on a static 2 x 2.4 metre panel at 0 degrees(vertical) at the range specified.

The data that has been used to create these records has come from Wikipedia, The Lone Sentry, The Bundes Archive and numerous books and websites that have provided the detailed information that has not been available anywhere else. The information we use to calculate the penetration tables, flight times and the hit probability comes from the Gun Calibre, the Shell Mass(Kg) and the muzzle velocity, plus range reductions to allow for gravity and wind resistance. This calculation originally came from a pre-war Krupp calculation which has been modified, and seems to fit the actual test results.

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